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About sinnlicht

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  • Location
    New York
  • Interested in Sound for Picture
  • About
    Independent Filmmaker

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  1. Sonotrim: Positive or Negative Bias?

    Thanks for the replies. Further digging revealed this information: Lavalier Power Supplies Lavalier Power Supplies come in a couple of different varieties. Some require you to use an internal battery, some require phantom power (12VDC, 48VDC or either), and some work both ways either with a battery or phantom Tram Negative Bias Power Supplies: Will operate only with the internal battery Tram Positive Bias Power Supplies: Will operate with either the internal battery or 12-48VDC Phantom Power. With Tram power supplies the positive bias version is the most versatile (giving you the option to use a battery or phantom power), but it is also a little more expensive. So if the TRAM power supply will not work with phantom power it must be negative bias. http://www.trammicrophones.com/sale/general/bias.asp
  2. Hi All, At the risk of sparking derision from the veterans, I have three Sonotrim lavs (all with external powering units with battery compartments). How can I know whether they are positive or negative ground when run through lectro wireless units, in order to ensure that they are not out of phase? I also have an equal number of TRAM 50's also with external units, some with battery compartments, some without. The question would also extend to these mics, and mixing them with the sonotrims. Thanks RL
  3. Audio RMS 12 Wireless tx/rx 473.6 MHz: Any info?

    Hi Philip, I fired it up and it seems to work fine. I did not seem to have any problems on that frequency, although I tested it in a somewhat secluded residential neighborhood. Not sure what I will end up doing with it. Do you think it is worth keeping as a back-up unit? Thanks RL
  4. Atomos Inferno Timecode

    Call Atomos USA support, I have always spoke to someone in less than 5 minutes and the person always had the answer. And the questions were not easy that I had. Shot in the dark, see if the FS700 will output freerun int gen TC via SDI to the inferno.
  5. Audio RMS 12 Wireless tx/rx 473.6 MHz: Any info?

    Hi Simon, anything that would have been found on a spec sheet is of interest, including things like range, the noise floor that you mention, battery consumption, audio quality, transmission mode, dates of manufacture, caveats, and so on. Thanks RL
  6. Audio RMS 12 Wireless tx/rx 473.6 MHz: Any info?

    The image is of another unit identical to the one I have, which is marked with 473.6 MHz. Philip, did you ever work with these units? Thanks RL
  7. Hi all, A friend just gave me an old wireless pair and I can't find any info on it at all. They are labelled as being in 473.6 MHz. Any info for the sake of curiosity would be appreciated. The picture below is of another one of these units that turned up at Gotham some time ago. Thanks Richard
  8. Hi all, To counter a lot of confusion circulated on the web, here is the definitive answer regarding the fact that R4 Pro's gain control and limiters are all PRE ADC: I can't confirm the noise circulating about the Roland designs based on a functional block diagram which only intends to show the last gain stage and limiters are in the A/D chip. It does not show signal flow thru the A/D chip. If that noise was based on engineering then you would not be able to achieve 24 bit resolution and you would have have a useless limiter ! This is what I say in my Recording FAQ. Please note, in an effort to reverse the flood of bad info circulating in some recording forums, I suggest reading the technical specifications for the AK4620B series of ADCs used in the R4Pro and the R44 which is available for download from the manufacturer's website or the link below. "- Input PGA: 0dB to +18dB, 0.5dB/step (for single-ended input)" This is a digitally controlled analog Programmable Gain Amplifier that is controlled by the inner gain knob. Furthermore, the block diagram, supplied by the A/D converter's manufacturer, clearly shows the PGA or analog gain circuit ahead of the analog to digital conversion process in the signal chain. This is essential or 24 bit resolution could not be achieved. Furthermore a digital limiter post A/D conversion is useless.I strongly suggest you not set the inner knob to 12:00 and add gain in post, this compromises the quality of your recordings. It's equally obvious there is no digital gain stage in the AK4620B series of A/D converters but there is digital attenuation and a digital output mute function. AK4620B technical data sheet : http://datasheet.elcodis.com/pdf2/105/21/1052101/ak4620b.pdf Note on page 23 :"The IPGA is an analog volume control that improves the S/N ratio compared with digital volume controls."
  9. MKH 815/816 Rycote Lyre Schock Mounts

    Excellent suggestions. Thanks again. I have the Rycote Lyres, and now know about the other options if this does not work well. RL
  10. Blackmagic Smartview mounting solutions

    I have to agree with the others re sdi cables, which do have to match spec for longer runs, particularly for something the length of a cable roll.
  11. Hi all, Rycote USA does not have any more 19mm clips for the Rycote Modular suspension for use with the MKH 815/816. Their replacement is the Rycote Lyre Upgrade Kit 042223. Using only two lyre mounts seems to not really be stable enough for the MKH 815/816. Does anyone have experience with whether using 3-4 lyre suspensions will noticeably increase the amount of vibration transmitted to the mic? Thanks, Richard
  12. Blackmagic Smartview mounting solutions

    This is a very cheap but effective solution for our documentary rig. The Smartview is in a 3RU wall bracket screwed to a Savage Universal 15.75" x 18.5" Air Flow Tech Table on top of some generic carbon fibre tripod legs; power provided by a custom cable from the Remote Audio BDS.
  13. Twelco 4x4 TW LP44 Field Mixer

    Hi Ira, yes, I have been working with Evan as well. The CS 104 had the 4 channel mod, and now has VU meters and the M/S output circuit mod (I use M/S a lot). I also had a custom cable made by Evan to feed the rca line level outputs of my SD usbpre2 into the aux mixer input of the CS 104, adding an additional 2 channels of mixing when needed. (PM me if you need more info on that, as there there are some caveats and additional equipment you need to make this work. I also output the xlr line levels of the SD to a ZFR 100 + STA 150 for two additional channels of TC recording).
  14. Help identify this lavalier?

    Gentlemen, I think you have it. This was a big help. Thanks!
  15. Help identify this lavalier?

    On the left our mystery guest. On the right an AT899 unscrewed to underscore the difference. But you guys may be pointing to the fact that the design of the AT899 changed over time? Thanks RL